Abstract: According to the featues of the spontaneous combustion fre accidents freqcuently ocurred in the remining production of Honghui No.1 Mine, with the statistic study on the fre accidents ocured in the.ill-mechanized topcal caving remining face,the paper providedthat the mine fre aocident would be seasonal ad a n-depth analysis on the mie fire accidents and the seasonal varation law of the mine natural ventlation pressure variation law.and had a further study on the seasonalvaiation of the natural venilation pressure affected to the goaf of the fuly-mechanized top coal caving reminin face and the ventlation pressure veniliaion volume and venilation oxygen supply method of the previous small nine fallre zone, as well s th climate conditon which made relativly increasethe oxygen conent in the goaf and thefalre sealed zone. With the application of the mine ventlation dynamic constant pressure echmnology and the ful redicton and forecat system with theventlation pressure, ventliaon voume as well as O2.CO.aky-olefn ratio and other representative gas in the fre rea and with thecomprehensive freprevention and control techical measues conducterd.including the timely and prevention grouting control of the goaf and the advanced control ofthe shotcreting sealed zonein the mine roadway,.the remining production safety of the38.876 7 milion tons coal resources in the serious falure zone of the previous small mine was ensured.